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Note 5 - Acquisitions and Discontinued Operations (Details Textual) - USD ($) $ in Thousands			3 Months Ended
	Oct. 26, 2023	Sep. 07, 2023	Mar. 31, 2024	Mar. 31, 2023
Goodwill, Measurement Period Adjustment			$ 94
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			(404)	$ 0
VA Lafayette [Member]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			(400)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			(400)
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation			(0)
Systems Products International, Inc.(SPI) [Member]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Payments to Acquire Businesses, Gross		$ 2,800
Goodwill, Measurement Period Adjustment			100
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Contract Assets			100
Digital Diagnostics Imaging, Inc. ("DDI") [Member]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Payments to Acquire Businesses, Gross	$ 11,000
Digital Diagnostics Imaging, Inc. ("DDI") [Member] | Maximum [Member]
Goodwill, Measurement Period Adjustment			$ 100

X

- Definition

This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to contract assets acquired in connection with a business combination for which the initial accounting was incomplete.

+ References

No definition available.

+ Details

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Namespace Prefix:	kfs_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-2

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Period Type:	instant

X

- Definition

Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

+ References

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-Topic 205
-SubTopic 20
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

+ References

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-SubTopic 20
-Name Accounting Standards Codification
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X

- Definition

Amount of tax expense (benefit) on gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 20
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-Section 45
-Paragraph 2
-Subparagraph (b)
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Period Type:	duration

X

- Definition

Amount of increase (decrease) from measurement period adjustment of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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-SubTopic 30
-Name Accounting Standards Codification
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X

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